Igneous rock is one of the three main rock types, the others being sedimentary
and metamorphic. Igneous rock is formed through the cooling and solidification of
Photographs and descriptions of intrusive and extrusive igneous rocks with links
to detailed articles by Geology.com.
Intrusive, or plutonic, igneous rocks form when magma cools slowly below the
Earth's surface. Most intrusive rocks have large, well-formed crystals. Examples ...
Igneous Rocks. There are places on Earth that are so hot that rocks melt to form
magma. Because magma is liquid and usually less dense than surrounding ...
Igneous rocks are classified according to their mineral content: ... Intermediate
rocks are roughly even mixtures of felsic minerals (mainly plagioclase) and mafic
Igneous rocks that form deep within the Earth's crust where temperatures are very
high might take thousands of years to cool down. This causes the crystals to ...
Jul 14, 2000 ... An Introduction to Igneous Rocks for the Beginner A very simple ... Bowen's
Reaction Series and Igneous Rock Forming Minerals pdf version
Get information, facts, and pictures about Igneous rocks at Encyclopedia.com.
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Jan 15, 2013 ... A quick introduction to igenous rocks. Download the flow chart at http://www.
May 22, 2014 ... This is the first chapter from Igneous, Sedimentary and Metamorphic Rocks, a
Science title from ClickView. The full 10 minute program is ...